to the bitter end

US /tə ðə ˈbɪtər ɛnd/
UK /tə ðə ˈbɪtər ɛnd/
"to the bitter end" picture
1.

끝까지, 최후까지

until a struggle or unpleasant experience is completely finished, despite difficulties or suffering

:
They fought to the bitter end, refusing to surrender.
그들은 항복을 거부하고 끝까지 싸웠다.
She decided to stick with the project to the bitter end, even though it was very challenging.
그녀는 매우 힘들었지만 프로젝트를 끝까지 고수하기로 결정했다.